Figure 1.

Doppler ultrasound evaluation of the hepatic artery. A: Intercostal color and spectral doppler image of a normal hepatic artery at the porta hepatis in the liver graft of a 51-year-old woman on postoperative day 3 after transplant, depicting a rapid systolic upstroke with continuous low-velocity diastolic flow and a normal resistive index; B: Subcostal color doppler image of the right hepatic lobe in a 46-year-old man on postoperative day 2 demonstrates vascular flow in the portal vein, with no hepatic artery flow detected on color or spectral doppler images at the porta hepatis.